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IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs.

SUMMARYTransmission Control Protocol/Internet Protocol (TCP/IP) forwarding is disabled by default in Windows 2000. This article describes how to enable TCP/IP forwarding on a Windows 2000-based computer. WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

Enabling TCP/IP Forwarding

1. Use Registry Editor (Regedt32.exe) to view the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Tcpip\Parameters
2. Set the following registry value:
Value Name: IPEnableRouter
Value type: REG_DWORD
Value Data: 1
NOTE: A value of 1 enables TCP/IP forwarding for all network connections installed and used by this computer.

REFERENCES

For additional information about TCP/IP forwarding, click the article numbers below to view the articles in the Microsoft Knowledge Base: